Download e-book for iPad: A History of Genetics by A.H. Sturtevant

By A.H. Sturtevant

ISBN-10: 0879696079

ISBN-13: 9780879696078

Within the small Fly Room at Columbia collage, T.H. Morgan and his scholars, A.H. Sturtevant, C.B. Bridges, and H.J. Muller, performed the paintings that laid the rules of recent, chromosomal genetics. the thrill of these occasions, while the full box of genetics was once being created, is captured during this e-book, written in 1965 by way of a kind of current firstly. His account is likely one of the few authoritative, analytic works at the early historical past of genetics. This beautiful reprint is followed by means of an internet site, delivering full-text models of the major papers mentioned within the ebook, together with the world's first genetic map.

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There were, however, a number of things, now part of common biological knowledge, that were not known. It was generally supposed that, when the chromosomes reappear at the end of the resting stage, they first do so as a single continuous thread, or spireme, which then breaks into the number of chromosomes characteristic for the particular species. ” Although Weismann adopted this view, Wilson felt that it was far from proved. The details of chromosome reduction at meiosis were not at all clear, chiefly because the two-by-two pairing in meiotic prophase was not recognized.

Balfour, and by his contemporary, Weldon. The summers of 1883 and 1884 were spent at Hampton, Virginia, and Beaufort, North Carolina, studying the embryology of Balanoglossus under W. K. Brooks. Bateson has recorded that it was Brooks who gave him the idea that heredity is a subject worth studying for itself. In passing, it may be remembered that Brooks also influenced the history of genetics through the fact that both E. B. Wilson and T. H. Morgan were trained by him. * This confirmation included extensive tests over several generations, showing that extracted homozygotes bred true.

The third reference was by L. H. Bailey (1895), who copied Focke’s statement without having himself seen Mendel’s paper; this was the source that led de Vries to Mendel, according to one account. Finally, Mendel was listed, without comment, as a plant hybridizer by Romanes in the ninth edition of the Encyclopaedia Britannica (1881–1895)— evidently again following Focke. Hugo de Vries (1848–1935) was born in Holland. His university training was largely in Germany, where he studied plant physiology with Sachs.

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A History of Genetics by A.H. Sturtevant

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